Film: 10 x 12” (24 x 30 cm) or 14 x 17 (35 x 43 cm)

Position of patient
- patient in supine position
- midsagittal plane of the body centered to the midline of the table

Position of part
- cross the patient’s leg on the side to be flexed over the opposite leg.
- place one hand against the side of the lumbar region
- place the thighs laterally to place the heel near the edge of the table and immobilize
- a compression band is placed to prevent rotation
- respiration is suspended

Central ray
- CR is perpendicular to the midlumbar region a the level of the 3rd lumbar vertebra.

Suructure shown
- two AP projections of the lumbar vertebrae in maximum right and left flexion is shown
- presence of structural change by unequal bend to right and left is present
- localization of herniated disk
- to demonstrate whether there is motion in the spinal fusion

Evaluation criteria
- the site of the spinal fusion should be in center of the radiograph
- pelvis should not be rotated